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robmcau
 Post subject: Failed cast of ValidateEventListener
PostPosted: Thu Mar 29, 2007 9:49 pm 
Newbie

Joined: Thu Mar 29, 2007 3:58 am
Posts: 5
I've solved this, but I find it so freaky that I thought I'd post it so others don't fall into the same trap, or even just in case it could be fixed.

Quick solution: ensure that you follow the 'normal' pattern of HibernateUtil with a static method that returns the session and no instances of the object itself.


I got a org.hibernate.validator.event.ValidateEventListener cannot be cast to org.hibernate.event.PreInsertEventListener on startup of hibernate. Other than trying to use annotations, I don't think I'm trying anything unusual.

What it turned out to be was that I'd written my own version of HibernateUtil that retrieved the session in an instance method rather than a static method.

This somehow caused the above exception to be thrown. When substituting a more traditional HibernateUtil, the exception wasn't thrown. It wasn't enough to use a static method to access it - if I created an instance of my object first it still failed - it seems that the first call to the object must be a call to a static method that gets the session.

So I suppose it's some sort of bug that depends on exact class loading order or something??

Anyway, in case it helps, details below.


Hibernate version: 3.2.2 GA
Annotations version: 3.3.0 GA
Java version: 1.6.0
JBoss version: 4.0.5 GA
Name and version of the database: Oracle 9i (9.2.0.7.0)

Copy of "Hibernate.cfg.xml" body:


Copy of "HibernateUtil" body:
(my version of Hibernate util is called SessionFactory)

Code:
    private static final List<Class> persistedClasses
        = Collections.unmodifiableList(Arrays.asList(new Class[]
        {
            Email.class,
            EmailId.class
        }));
   
    private static final org.hibernate.SessionFactory hibernateSessions;
   
    static
    {
        AnnotationConfiguration config = new AnnotationConfiguration();
        for (Class c: persistedClasses) config.addAnnotatedClass(c);
        config.configure();
        hibernateSessions = config.buildSessionFactory();
    }
   
    /** Returns a new session as part of the global hibernate configuration for
     *  this application.
     */
    public Session getSession()
    {
        return hibernateSessions.openSession();
    }


(note that the errors still occurs without adding any annotated classes, and without the config.configure() step.)

Code:
<?xml version='1.0' encoding='utf-8'?>

<!DOCTYPE hibernate-configuration
          PUBLIC
          "-//Hibernate/Hibernate Configuration DTD//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

    <session-factory>

        <property name="connection.datasource">java:myappDS</property>
        <property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>
        <property name="show_sql">false</property>
        <property name="transaction.factory_class">org.hibernate.transaction.JTATransactionFactory</property>
        <property name="jta.UserTransaction">java:comp/UserTransaction</property>

    </session-factory>

</hibernate-configuration>




Full stack trace of any exception that occurs:
(DbIdFactory is simply my first class that does anything with the database.)
Code:
java.lang.ExceptionInInitializerError
        at org.myapp.DbIdFactory.<init>(DbIdFactory.java:19)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
        at java.lang.Class.newInstance0(Class.java:355)
        at java.lang.Class.newInstance(Class.java:308)
        at org.myapp.emailgateway.PollerServlet.init(PollerServlet.java:59)
        at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1105)
        at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:932)
        at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:3951)
        at org.apache.catalina.core.StandardContext.start(StandardContext.java:4225)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:759)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:739)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:524)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:503)
        at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:164)
        at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
        at org.apache.catalina.core.StandardContext.init(StandardContext.java:5052)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.commons.modeler.BaseModelMBean.invoke(BaseModelMBean.java:503)
        at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:164)
        at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
        at org.jboss.web.tomcat.tc5.TomcatDeployer.performDeployInternal(TomcatDeployer.java:297)
        at org.jboss.web.tomcat.tc5.TomcatDeployer.performDeploy(TomcatDeployer.java:103)
        at org.jboss.web.AbstractWebDeployer.start(AbstractWebDeployer.java:371)
        at org.jboss.web.WebModule.startModule(WebModule.java:83)
        at org.jboss.web.WebModule.startService(WebModule.java:61)
        at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
        at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
        at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
        at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
        at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
        at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
        at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
        at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
        at $Proxy0.start(Unknown Source)
        at org.jboss.system.ServiceController.start(ServiceController.java:417)
        at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
        at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
        at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
        at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
        at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
        at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
        at $Proxy37.start(Unknown Source)
        at org.jboss.web.AbstractWebContainer.start(AbstractWebContainer.java:466)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
        at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
        at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
        at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
        at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
        at org.jboss.mx.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:97)
        at org.jboss.system.InterceptorServiceMBeanSupport.invokeNext(InterceptorServiceMBeanSupport.java:238)
        at org.jboss.ws.integration.jboss.DeployerInterceptor.start(DeployerInterceptor.java:92)
        at org.jboss.deployment.SubDeployerInterceptorSupport$XMBeanInterceptor.start(SubDeployerInterceptorSupport.java:188)
        at org.jboss.deployment.SubDeployerInterceptor.invoke(SubDeployerInterceptor.java:95)
        at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
        at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
        at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
        at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
        at $Proxy38.start(Unknown Source)
        at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1025)
        at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:819)
        at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782)
        at sun.reflect.GeneratedMethodAccessor54.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
        at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
        at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
        at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
        at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
        at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
        at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
        at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
        at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
        at $Proxy8.deploy(Unknown Source)
        at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:421)
        at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:634)
        at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:263)
        at org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentScanner.java:336)
        at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
        at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
        at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
        at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
        at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
        at org
10:00:19,473 INFO  [STDOUT] .jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
        at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
        at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
        at $Proxy0.start(Unknown Source)
        at org.jboss.system.ServiceController.start(ServiceController.java:417)
        at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
        at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
        at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
        at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
        at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
        at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
        at $Proxy4.start(Unknown Source)
        at org.jboss.deployment.SARDeployer.start(SARDeployer.java:302)
        at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1025)
        at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:819)
        at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782)
        at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:766)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
        at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
        at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
        at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
        at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
        at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
        at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
        at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
        at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
        at $Proxy5.deploy(Unknown Source)
        at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:482)
        at org.jboss.system.server.ServerImpl.start(ServerImpl.java:362)
        at org.jboss.Main.boot(Main.java:200)
        at org.jboss.Main$1.run(Main.java:490)
        at java.lang.Thread.run(Thread.java:619)
Caused by: java.lang.ClassCastException: org.hibernate.validator.event.ValidateEventListener cannot be cast to org.hibernate.event.PreInsertEventListener
        at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:783)
        at org.myapp.data.SessionFactory.<clinit>(SessionFactory.java:35)
        ... 145 more
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robmcau
 Post subject: Still a problem
PostPosted: Fri Mar 30, 2007 12:03 am 
Newbie

Joined: Thu Mar 29, 2007 3:58 am
Posts: 5
Actually, that just delayed the error - help anyone?

Code:
Hibernate failed to initialise
java.lang.ClassCastException: org.hibernate.validator.event.ValidateEventListener cannot be cast to org.hibernate.event.PreInsertEventListener
        at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:783)
        at org.myapp.data.SessionFactory.<clinit>(SessionFactory.java:40)
        at org.myapp.DbIdFactory.getNewId(DbIdFactory.java:26)
        at org.myapp.emailgateway.mail.MailClient.checkMail(MailClient.java:103)
        at org.myapp.emailgateway.PollWork.run(PollWork.java:82)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
        at java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:317)
        at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:150)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$101(ScheduledThreadPoolExecutor.java:98)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.runPeriodic(ScheduledThreadPoolExecutor.java:181)
        at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:205)
        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
        at java.lang.Thread.run(Thread.java:619)
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robmcau
 Post subject: Perhaps resolved this time
PostPosted: Fri Mar 30, 2007 1:01 am 
Newbie

Joined: Thu Mar 29, 2007 3:58 am
Posts: 5
OK, it seems to work OK with Annotations 3.2.1 instead of 3.3... of course i'm a little reticent to jump the gun and say it's fixed lest it blow up in my face later in the process :0)
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ericrius1
 Post subject: Re: Failed cast of ValidateEventListener
PostPosted: Tue Nov 13, 2012 1:28 pm 
Newbie

Joined: Tue Nov 13, 2012 1:24 pm
Posts: 1
Hi robmcau,
I was getting similar validating casting errors and am trying your approach. However, after I make the session static, I am now gettign initialization exception error when I try to instantiate a new SessionFatory rule in my test case. The ruel class is as follow

public class SessionFactoryRule implements MethodRule {
private SessionFactory sessionFactory;
private Transaction transaction;
private Session session;
public static Logger log = Logger.getLogger(SessionFactoryRule.class);

@Override
public Statement apply(final Statement statement, FrameworkMethod method, Object test)
{
return new Statement()
{
@Override
public void evaluate() throws Throwable
{


createSession();
beginTransaction();
try{
statement.evaluate();
} finally {
shutdown();
}
}

};
}

private void shutdown()
{
try{
try{
try{
transaction.rollback();
} catch (Exception ex) {
ex.printStackTrace();
}
session.close();
} catch (Exception ex) {
ex.printStackTrace();
}
sessionFactory.close();
} catch (Exception ex) {
ex.printStackTrace();
}
}

/**
* Sets session to use an in memory database for performance gains
*
* @author EricL
* @return
* @throws SQLException
* @throws ClassNotFoundException
*/
private static final SessionFactory hibernateSessions;
static
{
log.info("Session Factory Created");
try {
Class.forName("org.h2.Driver");
} catch (ClassNotFoundException e1) {
e1.printStackTrace();
}
try {
DriverManager.getConnection("jdbc:h2:mem:", "sa", "");
} catch (SQLException e) {
e.printStackTrace();
}

AnnotationConfiguration configuration = new AnnotationConfiguration();
//configuration.addAnnotatedClass(Facility.class);
configuration.setProperty("hibernate.dialect", "org.hibernate.dialect.H2Dialect");
configuration.setProperty("hibernate.connection.driver_class", "org.h2.Driver");
configuration.setProperty("hibernate.connection.url", "jdbc:h2:mem:");
configuration.setProperty("hibernate.hbm2ddl.auto", "create");

hibernateSessions = configuration.buildSessionFactory();

// return sessionFactory;
}

public Session createSession() {
// session = sessionFactory.openSession();
// return session;

return hibernateSessions.openSession();
}

public void commit()
{
transaction.commit();
}

public void beginTransaction()
{
transaction = session.beginTransaction();
}

public Session getSession()
{
return hibernateSessions.openSession();
}
}

And in my test case I do
@Rule
public final SessionFactoryRule sf = new SessionFactoryRule();
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